blustealer | 3879b7d1e92d9b91e94c83e35421b6b64c1e529e28335962c1da8626b0a29d83

General

Target

doc2022001001001.pdf.exe
Size

1.2MB
MD5

39b7ffa8957fe5a6ca72cca183a67d42
SHA1

41b478d0dbf80cf8a6fffc1b14230c193ae124e5
SHA256

3879b7d1e92d9b91e94c83e35421b6b64c1e529e28335962c1da8626b0a29d83
SHA512

43ebc7daf28ebf5ebc8016533e26b13d1e185610690badcf613af20f6e3ff66d7c0adc71dec714c50c06359182f421f3cf05983af2252c5fdd8375c1fa2631e2

Score

10^/10

blustealer stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5420760971:AAH01qjNE4a_MymOsvjAcXOxeYA3Wd9XCkE/sendMessage?chat_id=1856108848

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Control Panel\International\Geo\Nation	doc2022001001001.pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4500 set thread context of 2408	4500	doc2022001001001.pdf.exe	96

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4500	doc2022001001001.pdf.exe
4500	doc2022001001001.pdf.exe
4500	doc2022001001001.pdf.exe
4500	doc2022001001001.pdf.exe
4500	doc2022001001001.pdf.exe
4592	powershell.exe
4500	doc2022001001001.pdf.exe
4592	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4500	doc2022001001001.pdf.exe
Token: SeDebugPrivilege	4592	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2408	doc2022001001001.pdf.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 4592	4500	doc2022001001001.pdf.exe	91
PID 4500 wrote to memory of 4592	4500	doc2022001001001.pdf.exe	91
PID 4500 wrote to memory of 4592	4500	doc2022001001001.pdf.exe	91
PID 4500 wrote to memory of 3468	4500	doc2022001001001.pdf.exe	93
PID 4500 wrote to memory of 3468	4500	doc2022001001001.pdf.exe	93
PID 4500 wrote to memory of 3468	4500	doc2022001001001.pdf.exe	93
PID 4500 wrote to memory of 3108	4500	doc2022001001001.pdf.exe	95
PID 4500 wrote to memory of 3108	4500	doc2022001001001.pdf.exe	95
PID 4500 wrote to memory of 3108	4500	doc2022001001001.pdf.exe	95
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96
PID 4500 wrote to memory of 2408	4500	doc2022001001001.pdf.exe	96

C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svsbbPBTQBkgEG.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4592
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\svsbbPBTQBkgEG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp72E9.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3468
- C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe"
  2⤵
  PID:3108
- C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\doc2022001001001.pdf.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:2408

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp72E9.tmp

Filesize
1KB

MD5
2e2a8dd6b1406dfedcfbe4767fe0ba57

SHA1
dd0d51d27df3e87bd0b1013e3b39555e0fceecb2

SHA256
c21e11749958d10f614da13659c045c0723bb4f10f3f7b86e57ccb8b18a5fc1d

SHA512
2a8ece7739ed17ceb2863580a49c3b8512e25fe9f7a74d38e69cf751a84fdb411e49ac4937be6eac462a2e5c184019a98ac3856bf5b72dd8cff0b94ea6391242

Download Submit
memory/2408-162-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/2408-155-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/2408-151-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/2408-148-0x0000000000400000-0x000000000049B000-memory.dmp

Filesize
620KB

Download
memory/4500-137-0x0000000005920000-0x00000000059B2000-memory.dmp

Filesize
584KB

Download
memory/4500-138-0x0000000005D90000-0x0000000005D9A000-memory.dmp

Filesize
40KB

Download
memory/4500-139-0x000000000A600000-0x000000000A69C000-memory.dmp

Filesize
624KB

Download
memory/4500-140-0x0000000001610000-0x0000000001676000-memory.dmp

Filesize
408KB

Download
memory/4500-135-0x0000000000C80000-0x0000000000DB2000-memory.dmp

Filesize
1.2MB

Download
memory/4500-136-0x0000000005DD0000-0x0000000006374000-memory.dmp

Filesize
5.6MB

Download
memory/4592-150-0x0000000004A90000-0x0000000004AB2000-memory.dmp

Filesize
136KB

Download
memory/4592-159-0x0000000006100000-0x000000000611E000-memory.dmp

Filesize
120KB

Download
memory/4592-152-0x0000000004C30000-0x0000000004C96000-memory.dmp

Filesize
408KB

Download
memory/4592-143-0x0000000000DD0000-0x0000000000E06000-memory.dmp

Filesize
216KB

Download
memory/4592-156-0x0000000005B60000-0x0000000005B7E000-memory.dmp

Filesize
120KB

Download
memory/4592-157-0x0000000006120000-0x0000000006152000-memory.dmp

Filesize
200KB

Download
memory/4592-158-0x0000000071CA0000-0x0000000071CEC000-memory.dmp

Filesize
304KB

Download
memory/4592-145-0x0000000004D50000-0x0000000005378000-memory.dmp

Filesize
6.2MB

Download
memory/4592-160-0x0000000007490000-0x0000000007B0A000-memory.dmp

Filesize
6.5MB

Download
memory/4592-161-0x0000000006E50000-0x0000000006E6A000-memory.dmp

Filesize
104KB

Download
memory/4592-163-0x0000000006EC0000-0x0000000006ECA000-memory.dmp

Filesize
40KB

Download
memory/4592-164-0x00000000070D0000-0x0000000007166000-memory.dmp

Filesize
600KB

Download
memory/4592-165-0x0000000007080000-0x000000000708E000-memory.dmp

Filesize
56KB

Download
memory/4592-166-0x0000000007190000-0x00000000071AA000-memory.dmp

Filesize
104KB

Download
memory/4592-167-0x0000000007170000-0x0000000007178000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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